ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,746, issued on March 25, was assigned to B/E AEROSPACE INC. (Winston Salem, N.C.).

"Electro pneumatic and electromechanical actuated diaphragm type flush valve for aircraft toilet" was invented by Poly John (Cochin, India) and Gururaja Bambila (Bangalore, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "A flush valve includes a housing having a first end and a second end, a piston stem extending between the first end and the second end, a piston stem fore end coupled to the piston stem, a first O-ring and a second O-ring defining a control chamber therebetween, and a solenoid valve in fluid communication with the control chamber. The piston ste...